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H: Quadcopter return to home function not working
I have a small S49 quadcopter. Whenever I am flying it and initiate Return to Home on the controller, it always returns to the wrong location compared to where it launched from. Sometimes maybe 5/10 metres away. How can this be fixed?
AI: Having Googled the S49 drone, ... |
H: Why do multirotors usually have four propellors?
I've observed that hover-capable drones almost always have four propellers. There are helicopters of course, which have two, but in general, the vast majority of UAVs seem to go with four propellers.
It seems to me intuitively that this must be less efficient: More p... |
H: Why does a brushless drone fly longer?
I have noticed that drones with brushless motors fly longer than those with brushed motors. Why are drones with brushless motors able to fly for longer amounts of time?
AI: Brushless motors (aka BLDC) are typically[*] more efficient than brushed DC motors. Higher efficiency eq... |
H: ESCs for inverted flight?
What types of brushless drone ESCs are reversible and will work for flying inverted?
AI: ESCs loaded with recent versions of BLHeli (BLHELI_S and BLHELI_32) will support reversible motor direction, either through Dshot commands (obviously only supported when using Dshot signaling) or with ... |
H: How can I build a drone similar to a DJI Mavic 2?
I want to build a drone with the same functionality as a DJI's Mavic 2. Are there any books/videos/guides available? What would be involved?
I need a flying machine that:
has a good enough camera for short films
has at least 25 mins of flight time
is small and por... |
H: How do I re-charge the batteries of my S49 drone faster when outside?
I have a small S49 quadcopter. After around 10-15 minutes, it often runs out of charge and needs recharging. My charger requires it to be plugged into a portable USB charger or to the mains. I have tried charging using my power bank, but it takes... |
H: What are good specifications for a intermediate medium priced quadcopter?
What are good specifications for an intermediate medium-priced quadcopter? I have flown a smaller quadcopter before and developed a bit of an understanding of how they work and how to control it.
I would almost certainly like a camera and the... |
H: How do I pick my gear when getting started with FPV multirotors?
There are a large number of beginner and starter kits out there for people looking to get into multirotor FPV flying, all touting their various advantages over the competition.
What should I look for (or avoid) in an FPV drone kit, as someone who hasn... |
H: Getting Started with Aerial Photography
There are a large number of camera drones on the market covering a vast range of cost, from hundreds to thousands of Β£/β¬/$/etc.
What are the things to look out for in a photography drone for someone looking to try amateur drone photography?
Please focus on the drone specific ... |
H: Are there specific laws or regulations in the USA barring weapons on drones?
Are there specific laws or regulations in the USA on operating an armed drone, or do armed drones fall under ordinary weapons laws? More specifically, is it legal to fly a drone with a weapon under the following conditions:
The weapon is ... |
H: Flying a drone in France
In the future, I plan to fly a small (<250 gram) in France, are there any special licenses/permits that have to be obtained? What are the laws on this? Where are the no-fly zones located?
AI: You mention that this will be in the future. While the other answer covers the current situation we... |
H: One motor on quadcopter broken
I have a small quadcopter and I realised one of the motors does not turn electronically, meaning it can't fly properly. There is no visible sign of something stuck in the motor, like some string or something. What can I do to diagnose/fix the issue?
AI: So this method will vary based ... |
H: How to tell if you have a brushed or brushless motor?
I understand there are 2 main types of motors: brushed and brushless motors. How can you tell visibly what type of motor you have without researching/reading the manual?
AI: As a general rule-of-thumb, brushed motors usually have two wires, while brushless motor... |
H: Differences between brushed and brushless motors - advantanges and disadvantages of each
When buying a drone I have 2 options to consider: brushed and brushless motors. Are they much different from each other? Does one have advantages over the other?
AI: They are very different.
Brushed motors
Brushed motors are go... |
H: Optical sensors vs Ultrasonic sensors on a drone
Are there any performance differences between optical sensors and ultrasonic sensors? How do I make the right choice for my drone? I will be using them in a object detection system for collision prevention.
AI: Keyence has a useful comparison table:
βββββββββββββββββ... |
H: Barometer vs Rangefinder
On a small 6-7inch drone do I need a barometer, rangefinder or both? Is there a standard practice or does it just depend on use case?
AI: Technically, you don't need a rangefinder or a barometer for a normal drone but if you want to make a drone with altitude hold, I would recommend a barom... |
H: Effect of motor load on ESC?
I know that when a prop is caught on something or is slowed down by something it can put extra strain on the ESC or even burn it out.
If I was using a 2207 motor with an unusually large and heavy prop, would I need a more powerful ESC to compensate for the extra load of the large prop... |
H: Difference between analog and digital servos?
I've noticed that there is often a price gap between analog and digital servos. What is the difference between an analog and digital servo and why is a digital servo better?
AI: Analog Servos
Analog RC servos use a form of pulse width modulation (PWM) to control the spe... |
H: Headless mode on a drone
I have noticed my drone has headless mode listed as one of it's features.
This poses a few questions:
What does this mode do?
How is it different from normal mode?
How does it work?
How do I enable it?
AI: What is headless mode?
Headless mode is a specialized flying mode that is common... |
H: Keep quadcopter steady when taking a video
Whenever I take a video on my small quadcopter, itβs never steady. It always bounces up and down a bit rather than keeping level. How can this be stopped/prevented?
AI: I'm going to assume that you don't need your videos to be stabilised realtime. In this case you need ima... |
H: In drone racing with multirotors, how does one navigate the course?
Whenever we watch drone racing, there is usually a course marked out in cones.
However, when there is an obstacle such as a Jacobβs Ladder, the racers know the order to go through each of the gaps. Similarly, we sometimes see racers fly through the... |
H: Beeper beeps if transmitter is turned of even if it shouldn't
I have turned off all beeper sound signals in Betaflight Configurator, but the beeper still beeps if the transmitter is turned off. I thought that that shouldn't happen when RX_LOST was turned off or not paired, but maybe I have understood it wrong? Or i... |
H: When flying FPV in a group, what are the best video transmission channels/frequencies to use to avoid interference?
When flying FPV drones in a group setting it is very important to choose appropriate video transmission frequencies so you don't interfere with others that are flying near you. What are the best chan... |
H: What affects the total flight time for a drone?
What factors would affect a drone's flight time? Battery capacity? Weight? Anything else?
AI: I'd watch out for several factors:
1. Weight
Drop any additional weight that you don't absolutely need for functioning. This may mean downsizing to smaller motors, which obv... |
H: How fragile are the SMA connectors used in FPV equipment?
I've heard that it is a terrible idea to install and remove SMA antennae from my goggles every time I need to pack it away after a flight session. I know that this is because the SMA connector is fragile and wasn't designed for a high mating cycle rating, bu... |
H: Can I configure Betaflight in the field without using a laptop?
I often find myself wanting to make adjustments to the settings on my quadcopter in the field, especially when tuning PID settings and rate profiles. I currently bring a laptop with me wherever I go so I can plug in over USB and use the Betaflight conf... |
H: How hot is too hot when it comes to multirotor motors?
I hear this question asked all the time. Are my motors getting too hot? How hot is too hot for motors to get? Anyone have a great way to answer this question, possibly with some temperatures?
I generally go by feel. If I can pinch the motors with my fingers... |
H: How to create a motor startup tone with a BLHeli ESC?
I am using a 32bit DShot1200 ESC, how can I make a custom startup sound for when the drone is powered on?
AI: First, remove your props, plug your quad into the computer and plug in a battery.
You then need to go into BLHeli Suite 32 and read your ESC setup.
You ... |
H: Series or parallel connection for drone batteries?
What is the difference between adding two drone batteries in series vs a parallel connection for flying the drone?
AI: Batteries in series = add the voltages, ie two 3S 1300 30C packs becomes 6s 1300 30C.
Batteries in parallel = add the capacities, as above you get... |
H: How do you waterproof your electronics?
I fly FPV drones a lot in the winter where it is wet and snowy. What is the best way to protect your equipment from shorting out from water?
AI: The first step I take to help protect my gear from shorting out from water is to apply silicone conformal coating to all the elect... |
H: How to use an XM+ receiver without a flight controller?
All of the model aircraft I have seen without flight controllers normally have a receiver with all of the channels separate. Is there any way I can use a receiver like an XM+ receiver on a model aircraft without a flight controller?
AI: Yes, you most certainly... |
H: What is a filtered power pad on flight controller?
Having looked at many different flight controllers I saw that many of them have filtered power pads. What does it mean when it says filtered power?
AI: Without knowing more specifics about the board(s) you're asking about, it's more than likely that the filtered po... |
H: What's the difference between F4 or F7 flight controllers?
What is the difference between the STM32F411 and the STM32F722RET6 processors in flight controllers? What are the advantages of having the F7 processor over the F4 processor?
AI: There are a few differences:
Firstly, the F7 chip used in F7 flight controller... |
H: How to enter DFU mode on my flight controller?
How can I enter DFU mode on flight controllers, in particular on my CL Racing F4S flight controller?
Ref.: https://cl-racing.myshopify.com/products/clracing-f4s
AI: There are three ways you should know to enter DFU mode.
The first, as mentioned before, is to push down ... |
H: How does one hold the motor bell still when tightening prop nuts?
Almost all of the brushless motors used in hobby-grade multirotors have a single threaded shaft and rely only on friction between the propeller and motor to keep the prop from slipping. This means that the nuts holding the propeller down must be tigh... |
H: How do I tell when to replace the motors on my tinywhoop?
I own a brushed micro quadcopter, more commonly known as a tiny whoop. I've read that brushed motors in general, and especially those used in such quadcopters, have a limited lifetime and that you should replace them when they near the end of that lifetime. ... |
H: Can I run two motors off of one ESC?
Normally, a dual-motor plane has two ESCs but could I connect two brushless motors to one ESC? What would happen to the torque and speed of each of the two motors connected to the ESC?
AI: Technically, you could connect 2 motors, and it will probably work if they're exactly the ... |
H: Difference between a 3 and 6 axis gyro
When shopping for drones, I see a 3 and 6 axis gyro available, what is the difference between the two? Does one have a advantage when flying over another?
AI: There is actually no such thing as a 6-axis gyro; the correct term for this is "IMU", which stands for "Inertial Measu... |
H: What is RPM filtering in Betaflight?
I've seen a lot of buzz lately about the supposed advantages of using the RPM filtering option introduced in Betaflight 4.1. What is it and how does it improve inflight smoothness?
AI: Multirotors are inherently a very noisy environment for sensors like the gyroscope which try t... |
H: What props for a 2207 2750KV motor?
I have a 4s Nazgul5 drone. It is a 5'' drone and uses 2207 2750kv brushless motors. What is the most aggressive prop I can use on the drone without causing it to overheat or cause the battery to sag?
AI: Things like this are something that is usually only determined empirically, ... |
H: How to clean a drone?
I was just flying my drone when I crashed in some tall grass and there are now a bunch of grass bits all over the drone. How can I clean the drone without damaging it?
AI: I have found that the simplest and probably one of the safest ways is to use a compressor (alternatively a compressed air ... |
H: How to PID tune a 10" drone?
I have a 10" inch drone that I have trouble tuning. On the default Betaflight PIDs it feels really unstable, and I have tried to raise P, I and D both together and one by one without noticing much difference. Some things I almost doubled even. Since Betaflight is tuned for 5" inch quads... |
H: Video breakup problems with high power using The Force VTX?
I normally fly with my VTX on 200mw but sometimes I need it to be more powerful. Whenever I turn it to a higher power setting, though, the video becomes worse. When I set it to 600mw, the video seems to lose some color and turn black and white at times. Al... |
H: Effect of Deadcat frame on performance?
I've seen a lot of new frames with a Deadcat style because it keeps the props out of view for cinematic videos and such. Does the Deadcat shape of frame have any effects on flight performance?
AI: I personally have never used a Deadcat frame, but I found this forum thread ask... |
H: Difference between analog and digital FPV systems?
The new DJI digital FPV system and a few other systems are using a digital signal for FPV video. How is this different from a traditional analog signal for FPV drones?
AI: tl; dr:
Analog is:
Cheaper;
Lower resolution;
Has a noisier, more staticky picture that... |
H: How hot should an ESC get?
What is the maximum safe temperature that a brushless drone ESC should get? What could happen if a brushless ESC were to go over its maximum temperature tolerance?
AI: It really depends on the ESC. Different ESC's have different ratings.
Many ESCs would perform best under 85Β°C and some mi... |
H: When to replace bearings in a brushless motors?
When, if ever, should I replace the bearings in my drone's brushless motors? Are there signs that a motor needs new bearings?
AI: Bearings generally last much longer than the rest of the motors with how often we crash. If you notice a rougher noise or the motor doesnβ... |
H: Difference between iFlight XING-E and XING motors?
Is there any performance difference between iFlight's XING-E and XING lines of motors? I know that the XING motors have some better materials like titanium shafts but are there any performance differences?
AI: The Xing and Xing-E motors have two primary differences... |
H: Why do brushless drone motors tend to be more expensive than brushed?
The most common motors used for modern drones are brushless outrunner motors and I have heard that they are simpler to manufacture and are less susceptible to issues when being mass-produced than brushed motors because the only parts of the brush... |
H: Isnβt flying FPV drones illegal accoding to FAA rules?
I understand there is First Person View (FPV) drone flying which involves putting on a headset and controlling the drone from the live camera feed,
The FAA Rules For Unmanned Aircraft Part 107 state:
Visual line-of-sight (VLOS) only; the unmanned aircraft must... |
H: Drone βfine tuningβ
On my controller for my drone there are 4 buttons:
Forward fine-tuning
Left fine-tuning
Back fine-tuning
Right fine-tuning
What is βfine-tuningβ and how does one decide what direction to βfine-tuneβ in?
AI: Generally, the term for this is "trim". It is used to slightly adjust the center posit... |
H: Recommend safe distance from other drone flyers
When going to fly my drone, I notice there are a few other drone flyers as well.
What is the recommended safe distance to be kept from other drone users in order to not cause an accident?
AI: In this situation, I would approach the other flyer(s) to say hello and disc... |
H: Does the performance of a brushless motor decrease over time?
The brushes wear out in brushed motors and their performance decreases until they stop working, but brushless motors have fewer parts in contact and thus don't wear out nearly as fast.
Does the performance of a brushless motor decrease over time or does... |
H: What's the purpose of airmode and idle up?
What are airmode and idle up and what do they do improve my freestyle flights?
AI: Airmode and idle up both seek to increase a control authority and stability during ultra-low throttle moves.
In normal flight, when the pilot commands the multirotor to pitch or roll (cyclic... |
H: How are Hall effect gimbals different than standard gimbals?
I know that hall effect gimbals are supposed to be better than standard gimbals and are seen on a lot of expensive transmitters. What are the differences between a Hall effect gimbal and a standard gimbal?
AI: The difference is in how the gimbal position ... |
H: What propellers should I get for my drone?
How do I know what type of propellers to get for my drone and what do the specific numbers for each propeller mean?
AI: The first step to getting the right propellers is to figure out what size propellers will fit your drone. What you can do is measure the distance from th... |
H: Why don't multiprotocol transmitters work with Radiolink receivers?
I have a Jumper T16 and am wondering why it or any other multiprotocol transmitters don't work with Radiolink receivers. Is there a reason for this?
AI: The Jumper T16 multiprotocol module doesn't support Radiolink receivers, as you know. This is b... |
H: Why do a quadcopter's opposite rotors spin in the same direction?
All the quadcopters I've seen have four motors, arranged in a square-like shape. Two of these rotors spin one way, and two of them spin the other way so that the main body of the quadcopter doesn't rapidly spin as it flies. (Conservation of angular m... |
H: How does a propeller with more blades create more "grip"
I have heard that the more blades a prop has, the more "grip" it has in the air at the expense of speed.
How do more blades create more grip but lose top speed?
AI: Aside from fancy material science which can result in propellers that interact with air more ... |
H: How to update the firmware of a T16 Pro's internal multiprotocol module?
How should I go about updating the internal multiprotocol module firmware of my Jumper T16 Pro?
AI: The first thing to do is to check that you have the bootloader. Newer radios should have it installed. (Just check that you have Multiprotocol ... |
H: How to drive a servo for a tricopter with a flight controller?
Is there any way to set up a servo with full control for a tricopter using a normal flight controller and normal drone parts? Are there any other things that I should use or consider?
This servo will be used to roll the rear motor (there will be two fro... |
H: What happened to DSHOT1200 support in Betaflight?
I just went to update my flight controller from 3.5.3 to 4.1.0, and I noticed that some time in the past two years the option to enable DSHOT1200 was removed from Betaflight.
Does anyone know why this happened? Was it something to do with the release of RPM filterin... |
H: Can you cancel an automatic landing triggered by a low battery on the Dji Mavic 2 Pro?
Whenever the DJI Mavic 2 Pro has a low battery it initiates a function that lands it. Sometimes this can happen when the drone still has a lot of battery capacity e.g. 45%.
Is there a way to cancel this return to home function?
A... |
H: Advantages to having more rotors?
I have a quadcopter drone, is there an advantage say of having a octocopter instead of a quadcopter. Will it improve performance?
AI: Performance is unlikely to be improved, in terms of speed or agility, or even load-bearing capacity, as they are heavier, slightly less efficient ae... |
H: Differences between fiberglass-reinforced plastic and polycarbonate propeller materials?
What are the differences between drone props that are built from fiberglass-reinforced plastics and props made from polycarbonate?
AI: The main differences are:
Fiberglass-reinforced plastics: Very stiff for their weight which... |
H: How do I set up the RSSI readout on an XM+ receiver channel?
I have an old XM+ receiver that does not do RSSI. Some of the newer ones come with RSSI set up on a channel. How can I set up RSSI to be on a certain channel?
AI: For the sake of the random visitor I must first point out that the XM and XM+ receivers do n... |
H: Difference between T700 carbon frames and 3k carbon frames?
I have heard that iflight's Green Hornet uses T700 carbon instead of 3k carbon. What difference does the new T700 carbon make?
AI: First of all, the 300 or 700 is the grade value of carbon fiber and generally, a higher grade means more strength and better ... |
H: How does a quadcopter flip without falling very much?
I have a quadcopter and it has a flip function (as do many other quadcopters).
I was wondering how this works. Say I am flipping it right (clockwise), I assume the motors on the left spin much faster than those in the right. If so, how does the quadcopter not lo... |
H: Why is 5.8ghz used for FPV and 2.4ghz use for transmitters?
Why do most VTXs use 5.8ghz and most transmitters use 2.4ghz?
AI: As is discussed in this Oscar Liang article, FPV hardware exists for all different kinds of frequency bands, stretching from 900 MHz to 5.8 GHz, with 5.8 GHz being the most popular today. Pe... |
H: Difference between XM and XM+ receivers?
I have seen both XM and XM+ receivers and am wondering which one would be better to get for a micro-drone build. What are the differences in specs? (range, reliability, weight, etc)
AI: According to Oscar Liang, the XM+:
Is larger and heavier than XM (21.5 x 12 x 3.5 mm β 1... |
H: What is DSHOT in ESCs?
I've heard that modern quadcopters use a DSHOT protocol. Could you describe what it is?
What's its purpose?
AI: DShot is a protocol that flight controllers use for communicating with ESCs. It stands for 'Digital Shot'. It is a new digital communication protocol developed by Flyduino in collab... |
H: How to recognize damaged brushless outrunner motors?
I would like to know how to recognize damaged brushless motors on a drone? What are the most common symptoms?
AI: There are many signs that a brushless motor is broken or getting worn out. Something that can happen to motors that have been used for a long time is... |
H: Where do we download Betaflight Configurator and Blackbox Explorer?
I have picked up an older quad to get some experience in FPV flying. I'm not sure of the make or model of the quad - it doesn't seem to have a label. It does come with some printed instructions for setup and use, but these seem to be out-of-date.... |
H: What is antenna gain?
As I understand it, generally, a higher gain antenna will result in a longer range and better reception for FPV flying. What is antenna gain? What makes a low-gain patch antenna different that a high-gain patch antenna?
AI: Gain, as a general term, is a measure of how large or strong something... |
H: Are there any brushed outrunner motors?
The most common motors on drones are brushless outrunner motors. IΒ΄ve also seen some brushless inrunner motors. Are there any brushed outrunner motors? If so, why are they so uncommon?
AI: The difference between outrunner and inrunner BLDC (brushless DC) motors is that an out... |
H: Why do most multirotors use outrunner brushless motors?
I've noticed that most every quadcopter drone I see uses outrunner BLDC motors like this:
Why is that? What unique advantages to outrunners have that make them better than inrunners for multirotors?
AI: The difference between outrunner and inrunner BLDC (brus... |
H: What blocks an FPV video signal?
I am interested in long-range range FPV flying. What things block the video signal of a 5.8gHz video transmitter the most?
AI: Just about anything will block/interfere with radio signaling if there's enough of it in the path between the transmitter and receiver or in the immediate v... |
H: How do you build and use a smoke stopper?
What is the right way to build and use a "smoke stopper" device to prevent a short or other improper wiring from damaging your electronics?
Is it different depending on what voltage you are using?
AI: There are different ways, but a common one is to put a light bulb in ser... |
H: What is the performance difference between a brushless motor with a wider vs taller stator?
In the drone motor industry, there are a lot of variations in the stator sizes of brushless motors. There are several motors that have similar stator volume but one is wider and the other is taller. What are the inherent dif... |
H: What is the difference between a patch and helical antenna?
I have seen both patch and helical antenna when shopping for video receiver antennae. All I know is that they are both directional antennae. Do these types of antennae have any inherent performance differences? (IΒ΄m talking specifically about 6-turn helica... |
H: What is the typical glide ratio of Kline-Fogleman airfoils?
Kline-Fogleman (KFm) airfoils, despite their seeming contradiction with known principles of aerodynamics, seem to be very popular in RC modelling, and are known to have a peculiar stall behavior, with a gradual transition to high drag without loss of lift,... |
H: Can I salvage a 4in1 ESC?
I have a 4in1 Brushless ESC that only one ESC burned out on, but the rest should still be usable. Is there a way to salvage it and use a single ESC to replace the burned one or something? If so, how would I go about doing that?
AI: As ifconfig pointed out, the most common way to continue u... |
H: Can circularly and linearly polarized antennae be used together for FPV?
I have a few spare antennae of mixed polarizations I'd like to be able to reuse for my FPV gear.
Is there anything I need to know about incompatible configurations of mismatched polarizations between my transmitting and receiving antennae?
AI... |
H: Can I use LiHV batteries as normal batteries?
I have a small drone and the only batteries I can find that fit it are LiHV batteries. Can I use LiHV batteries like normal LiPo batteries? Can I just simply charge a LiHV battery to 4.2v and fly with it?
AI: Yes, you can. The primary difference between LiHV and LiPo ba... |
H: How to determine the correct specification of servo for a control surface
Servos come in a large range of sizes, torque values, etc. and the servo to use depends on a number of factors such as control surface size, aircraft speed and desired manoeuvrability.
While there is some intuitive correlation (as an aircraft... |
H: How do I calculate thrust for a quadrocopter?
I am designing a quadrocopter style aircraft that uses a 20 inch propeller 1.625 inches in width and has a pitch of 8 inches. How do I calculate static lift / thrust and the dynamic thrust / lift forces when it would be moving in a direction (not diagonal in an upward o... |
H: Would the FAA's proposed Remote ID really ground older drones?
The FAA has proposed new rules regarding drones, particularly Remote ID
Remote ID would assist the FAA, law enforcement, and Federal security agencies when a UAS appears to be flying in an unsafe manner or where the drone is not allowed to fly.
The dev... |
H: How to fix OSD displaying weird symbols
I upgraded from betaflight 3.X to betaflight 4.1.X and now my OSD displays weird symbols.
It seems to have replaced the crosshair. (The 3 L shapes in the center)
Expected result:
How can I fix it?
AI: I fixed it by re-uploading the font to the flight controller.
Some people... |
H: What is a "mushroom antenna"?
In Can circularly and linearly polarized antennae be used together for FPV? I read about a "mushroom antenna". While I have very little experience with FPV drones I am generally experienced in radios and I had not heard of such a thing, so my curiosity was piqued.
Searching the cyberne... |
H: How to program drones that have old flight controllers?
I have a few components of drones like some old FCs and old ESCs and I don't want them to go to waste. Is there any way to configure a drone that I built with those parts, as I don't think the FCs are capable of running BetaFlight. (are there any really simpli... |
H: How to charge LiPo batteries in series?
Is there any way to use my main charger, which can charge 2-6s batteries, to safely charge multiple 1s batteries in series? (assuming all of the batteries are the same capacity)
How would I go about doing this?
AI: Huh. I never thought about this before, but charging identica... |
H: What is the point of a dual-gyro setup for a FC?
When looking for a flight controller for a drone build, I have seen some FCs with dual-gyros. What is the purpose of having two gyros on a FC? (Are there any advantages or disadvantages)
AI: A major advantage is redundancy, so that the aircraft can continue flying if... |
H: Quality of transmitted image and electrical problems
There is a question already regarding a flickering OSD, but I wonder how other image quality problems relate to electrical problems. What's the first thing one has to look for when the transmitted image is jumping or features vertical running lines or the quality... |
H: Is voltage sag safe if the voltage isn't too low?
I know that a liPo cell should never be below 3.0 volts, but can voltage sag during high throttle maneuvers damage the battery excessively even if the voltage it not below that level?
And if that is the case; should you try to limit how much the voltage sags by gett... |
H: Are there any extremely small brushless drone motors?
I have seen many tiny brushed drones, about an inch from motor to motor, and was wondering whether it would be possible to create a brushless drone that small. Are there any brushless motors available that are extremely small, ones that could fit on the size of ... |
H: Does active braking help protect propellers from damage?
As far as I know with active braking option enabled in BLHeli32 the speed controller will counteract the free spinning of the rotor according to throttle value hence making it slow down quicker when needed. Could this help protect propellers upon crash?
AI: N... |
H: At what current should I charge a LiPo battery?
I have several different LiPo batteries which I use with my drones, many of them are different voltages and different capacities. How do I know at what current I should charge my drone LiPo batteries?
AI: Charging Lithium batteries is a far more delicate process than ... |
H: What does the TVL rating mean for FPV cameras?
I see listings for analog FPV cameras like this one which have ratings in units of TVL. (e.g. 1000 TVL or 1200 TVL) What is TVL?
AI: TVL (TeleVision Lines) is a measurement of the "resolution" of an analog camera. Digital video systems use pixel resolution to specify h... |
H: How to mount XM+ receiver antennas?
I like to use XM+ receivers on many drones as they seem to work well and are small/light. What is the best angle and position to mount the antennas of an XM+ receiver in order to get the best signal?
I have often seen XM+ antennas mounted at a 90ΒΊ from one another on the back of ... |
H: When I power up my flight controller and ESC's, I hear a series of beeps. What do all of the beeps mean?
How can you use the series of beeps you hear when powering up to diagnose issues with your equipment? Should all of the beeps be synchronized or is it ok if they are slightly off? Are there different patterns ... |
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